Electron gun online disassembly equipment for electron accelerator

Abstract

The invention relates to an electronic gun on-line assembly and disassembly device which does not damage the accelerating tube vacuum environment of an electron accelerator. The electronic gun on-line assembly and disassembly device structurally comprises an airtight tube fitting which is divided into an upper portion and a lower portion by a vacuum isolating part. The lower end of the airtight tube fitting is connected with the inlet end of an accelerating tube, an upper-portion space of the airtight tube fitting is connected with a vacuum pump pumping pipe, an electronic gun positioning part is arranged in a lower-portion space of the airtight tube fitting, an electronic gun is installed at the bottom of the electronic gun positioning part, and the electronic gun positioning part is connected with a vacuum keeping expansion part arranged at the top end of the airtight tube fitting. The accelerating tube vacuum environment is not damaged when the electronic gun is replaced, a distance between the electronic gun and the accelerating tube is short, and accordingly the requirement for beam current transmission optics is met.

Description

technical field [0001] The invention relates to the disassembly and assembly technology of an electron accelerator, in particular to an online disassembly and assembly device for an electron gun that does not destroy the vacuum environment of the accelerating tube of the electron accelerator. Background technique [0002] The electron gun is one of the key components of the electron accelerator, and it is also a vulnerable part. Regardless of the performance index of the electron gun, it has a certain life span. The emitter that emits electrons is the most important vulnerable part of the electron gun. The electron gun housing of some accelerators is not in a vacuum environment, but the electron emitters are all in a vacuum environment. [0003] When replacing a damaged or near-end-of-life electron gun, it is often desirable not to disrupt the vacuum environment of the accelerating tube to which the electron gun is connected. Because if the vacuum of the accelerating tube i...

AI Technical Summary

Problems solved by technology

Because if the vacuum of the accelerating tube is broken, high-pressure aging needs to be carried out again when restarting work. This aging process is time-consuming and laborious. If the accelerator is used in the field of industrial production, it will inevitably seriously affect the production order.

[0004] On the other hand, from the perspective of beam optics, it is hoped that the distance between the electron gun and the accelerator tube should be as close as possible, otherwise, for high-current electron beams, the space charge force of long-distance space transmission will cause the beam emittance to increase , resulting in a decrease in the quality of the beam, making electrons easily lost in the accelerating tube and reducing the power of the output electron beam

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